Colour of Ca(CoxMg1-x)Si2O6 pyroxenes and their technological behaviour as ceramic colorants

被引：7

作者：

Gori, Claudia ^{[1
]}

Mantovani, Luciana ^{[1
]}

Tribaudino, Mario ^{[1
]}

Zanelli, Chiara ^{[2
]}

Dondi, Michele ^{[2
]}

机构：

[1] Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Plesso Sci Terra, Parma, Italy

[2] ISTEC CNR, Ist Sci & Tecnol Mat Ceram, Faenza, Italy

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 11期

关键词：

Cobalt leaching; Glaze; Pigment; Pyroxene; TETRAHEDRALLY COORDINATED CO2+; OPTICAL-PROPERTIES; CHROMIUM PIGMENTS; CRYSTAL-STRUCTURE; SOLID-SOLUTIONS; COBALT; GLAZES; SILICATE; SPECTRA; MICROSCOPY;

D O I：

10.1016/j.ceramint.2018.04.078

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cobalt-based pigments were synthesized using clinopyroxene as crystalline host. The pigments are a Ca(CoxMg1-x)Si2O6 solid solution, with x = 0.05, 0.2, 0.4, 0.5, 0.6, 0.8 Co apfu, and were synthesized from melt. The pigments were characterized by single-crystal X-ray diffraction, SEM-EDS, optical microscopy, colorimetry and optical spectroscopy. The pigments were then tested in glazes and glassy coatings for ceramic tiles to determine their colouring performance. The synthesized pigments showed a pink colour with different shades, due to the absorption of Co2+ in octahedral coordination. The colour disappeared in the Ca(Co0.05Mg0.95)Si2O6 pigment after grinding. The Ca(CoxMg1-x)Si2O6 pigments partially dissolved in glazes, acting like dyes, and bestowed a blue shade on coatings, with a colour efficiency similar to industrially used blue colorants (cobalt aluminate spinet and cobalt olivine). In the glassy coatings, pigment dissolution occurred at a lower extent, and a colour intermediate between the pyroxenes and the pigment-bearing glazes was obtained. The Co content in pyroxene dyes is lower than conventional pigments, being down to 5%wt.

引用

页码：12745 / 12753

页数：9